package com.mysiteforme.admin.util;

import com.mysiteforme.admin.entity.question.ChQuestion;
import com.mysiteforme.admin.entity.question.ChQuestionVO;
import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.formula.functions.T;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

@Component
public class ExcelInsertUtil {
    private static Logger logger  = Logger.getLogger(ExcelInsertUtil.class);
    private final static String xls = "xls";
    private final static String xlsx = "xlsx";

    /**
     * 读入excel文件，解析后返回
     * @param file
     * @throws IOException
     */
    public static List<ChQuestionVO> readExcel(MultipartFile file) throws IOException, ParseException {
        //检查文件
        checkFile(file);
        //获得Workbook工作薄对象
        Workbook workbook = getWorkBook(file);
        //创建返回对象，把每行中的值作为一个数组，所有行作为一个集合返回
        List<ChQuestionVO> list = new ArrayList<>();
        if(workbook != null){
            for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){
                //获得当前sheet工作表
                Sheet sheet = workbook.getSheetAt(sheetNum);
                if(sheet == null){
                    continue;
                }
                //获得当前sheet的开始行
                int firstRowNum  = sheet.getFirstRowNum();
                //获得当前sheet的结束行
                int lastRowNum = sheet.getLastRowNum();
                //循环除了第二行的所有行
                for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){
                    //获得当前行
                    Row row = sheet.getRow(rowNum);
                    if(row == null){
                        continue;
                    }
                    //获得当前行的开始列
                    int firstCellNum = row.getFirstCellNum();
                    //获得当前行的列数
                    int lastCellNum = row.getPhysicalNumberOfCells();
                    String[] cells = new String[row.getPhysicalNumberOfCells()];
                    //循环当前行
                    for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
                        Cell cell = row.getCell(cellNum);
                        cells[cellNum] = getCellValue(cell);
                    }
                    ChQuestionVO chQuestionVO = excelToObject(cells);
                    list.add(chQuestionVO);
                }
            }
            workbook.close();
        }
        return list;
    }

    public static void checkFile(MultipartFile file) throws IOException{
        //判断文件是否存在
        if(null == file){
            logger.error("文件不存在！");
            throw new FileNotFoundException("文件不存在！");
        }
        //获得文件名
        String fileName = file.getOriginalFilename();
        //判断文件是否是excel文件
        if(!fileName.endsWith(xls) && !fileName.endsWith(xlsx)){
            logger.error(fileName + "不是excel文件");
            throw new IOException(fileName + "不是excel文件");
        }
    }
    public static Workbook getWorkBook(MultipartFile file) {
        //获得文件名
        String fileName = file.getOriginalFilename();
        //创建Workbook工作薄对象，表示整个excel
        Workbook workbook = null;
        try {
            //获取excel文件的io流
            InputStream is = file.getInputStream();
            //根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象
            if(fileName.endsWith(xls)){
                //2003
                workbook = new HSSFWorkbook(is);
            }else if(fileName.endsWith(xlsx)){
                //2007
                workbook = new XSSFWorkbook(is);
            }
        } catch (IOException e) {
            logger.info(e.getMessage());
        }
        return workbook;
    }
    public static String getCellValue(Cell cell){
        String cellValue = "";
        if(cell == null){
            return cellValue;
        }
        //把数字当成String来读，避免出现1读成1.0的情况
        if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
            cell.setCellType(Cell.CELL_TYPE_STRING);
        }
        //判断数据的类型
        switch (cell.getCellType()){
            //数字
            case Cell.CELL_TYPE_NUMERIC:
                cellValue = String.valueOf(cell.getNumericCellValue());
                break;
            //字符串
            case Cell.CELL_TYPE_STRING:
                cellValue = String.valueOf(cell.getStringCellValue());
                break;
//            //Boolean
//            case Cell.CELL_TYPE_BOOLEAN:
//                cellValue = String.valueOf(cell.getBooleanCellValue());
//                break;
            //公式
//            case Cell.CELL_TYPE_FORMULA:
//                cellValue = String.valueOf(cell.getCellFormula());
//                break;
            //空值
            case Cell.CELL_TYPE_BLANK:
                cellValue = "";
                break;
            //故障
            case Cell.CELL_TYPE_ERROR:
                cellValue = "非法字符";
                break;
            default:
                cellValue = "未知类型";
                break;
        }
        return cellValue;
    }

    public static ChQuestionVO excelToObject(String[] cells) throws ParseException {
        ChQuestionVO chQuestionVO = new ChQuestionVO();
        chQuestionVO.setId(IdWorker.getId());
        for(int i = 0 ; i<cells.length; i++){
            switch (i){
                case 0:
                    chQuestionVO.setKeyWords(cells[i]);
                    break;
                case 1:
                    chQuestionVO.setLorePointId(cells[i]);
                    break;
                case 2:
                    chQuestionVO.setQuestionDescribe(cells[i]);
                    break;
                case 3:
                    chQuestionVO.setQuestionAnalysis(cells[i]);
                    break;
                case 4:
                    chQuestionVO.setAnwser1(cells[i]);
                    break;
                case 5:
                    chQuestionVO.setAnwser2(cells[i]);
                    break;
                case 6:
                    chQuestionVO.setAnwser3(cells[i]);
                    break;
                case 7:
                    chQuestionVO.setAnwser4(cells[i]);
                    break;
                case 8:
                    if(cells[i].contains("1")){
                        chQuestionVO.setA1ok("1");
                    }else{
                        chQuestionVO.setA1ok("2");
                    }
                    if(cells[i].contains("2")){
                        chQuestionVO.setA2ok("1");
                    }else{
                        chQuestionVO.setA2ok("2");
                    }
                    if(cells[i].contains("3")){
                        chQuestionVO.setA3ok("1");
                    }else{
                        chQuestionVO.setA3ok("2");
                    }
                    if(cells[i].contains("4")){
                        chQuestionVO.setA4ok("1");
                    }else{
                        chQuestionVO.setA4ok("2");
                    }
                    if(cells[i].length()>1){
                        chQuestionVO.setQuestionType(2);
                    }else{
                        chQuestionVO.setQuestionType(1);
                    }
                    break;
                default:
                    System.out.println("参数存在问题");
                    break;
            }
        }
        return chQuestionVO;
    }



}
